Rohde & Schwarz R&S FSP Series, Руководство по эксплуатации

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R&S FSP Remote Control – Description of Commands
SENSe Subsystem
6.146 Operating Manual 1164.4556.12 - 06
[SENSe<1|2>:]BANDwidth|BWIDth[:RESolution]:AUTO ON | OFF
In analyzer mode, this command either automatically couples the resolution bandwidth of the
instrument to the span or cancels the coupling.
The automatic coupling adapts the resolution bandwidth to the currently set frequency span according
to the relationship between frequency span and resolution bandwidth.
The 6 dB bandwidths 200 Hz, 9 kHz and 120 kHz and the channel filters are not set by the automatic
coupling.
The ratio resolution bandwidth/span can be modified with the command
[SENSe<1|2>:
]BANDwidth[:RESolution]:RATio
.
Example:
"BAND:AUTO OFF"
'Switches off the coupling of the resolution bandwidth to the span (analyzer mode).
Characteristics: *RST value: ON
SCPI: conform
Mode: A-F
[SENSe<1|2>:]BANDwidth|BWIDth[:RESolution]:RATio 0.0001 to 1
This command defines the ratio resolution bandwidth (Hz) / span (Hz). The ratio to be entered is
reciprocal to the ratio span/RBW used in manual operation.
Example:
"BAND:RAT 0.1"
Characteristics: *RST value: 0.02 with BAND:TYPE NORMal or RBW > 30 kHz
0.01 with BAND:TYPE FFT for RBW
≤
30 kHz
SCPI: conform
Mode: A
[SENSe<1|2>:]BANDwidth|BWIDth[:RESolution]:TYPE NORMal | FFT | CFILter | RRC | PULSe
This command switches the filter type for the resolution bandwidth between "normal" analog or FIR
filters in 1, 3, 10 steps and the FFT filtering for bandwidths <100 kHz.
The advantage of FFT filtering is the higher measurement speed compared to digital filters with analog
filter characteristic. However, FFT filters are only suitable for periodic signals, and they are only
available for span > 0 Hz.
From firmware version 1.10 onwards, steep-edged channel filters and filters with RRC (Root Raised
Cosine) characteristic are available.
The possible combinations of filter type and filter bandwidth are listed in chapter
“Instrument Functions” , section “Filter Types” on page 4.24 .
The filter type PULSe selects the 6 dB bandwidths for EMI measurements.
Channel filters are available from firmware version 1.10 or higher.
When changing the filter type, the next larger filter bandwidth is selected if the
same filter bandwidth is not available for the new filter type.